Summary & Overview
CPT 27488: Removal of Total Knee Prosthesis, With or Without Spacer
Headline: CPT 27488 — Removal of Total Knee Prosthesis, Often with Spacer
Lead: CPT 27488 defines the surgical removal of a total knee prosthesis, frequently performed when implants fail, become infected, or require staged revision. It is an inpatient orthopedic procedure with implications for hospital resource use, perioperative care, and postoperative rehabilitation.
What this code represents and why it matters: CPT 27488 captures explantation of a knee prosthesis and possible insertion of a spacer, a key step in managing prosthetic joint infection and complex revisions. Nationally, this code affects hospital surgical caseloads, length of stay considerations, and bundled payment models tied to joint arthroplasty episodes.
Key payers covered: The analysis covers major national payers including Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.
What readers will learn: The publication provides a concise clinical and billing overview of CPT 27488, compares related knee arthroplasty and revision codes, outlines typical inpatient utilization patterns, and explains common clinical contexts for explantation. It highlights relevant coding relationships for charting and claims submission and notes where input data is unavailable.
Additional notes: Service-line metadata was not provided. Data not available in the input where applicable.
CPT Code Overview
CPT 27488 describes the surgical removal of a knee prosthesis, including removal of a total knee prosthesis with methylmethacrylate, and may include insertion of a spacer. This procedure falls under Orthopedic Surgery and addresses situations requiring explantation of a knee implant, such as infection, mechanical failure, or preparation for staged revision.
The typical site of service for CPT 27488 is Inpatient Hospital (POS 21), where perioperative management and postoperative monitoring are provided in a hospital setting.
Clinical & Coding Specifications
Clinical Context
A 68-year-old patient with a previously implanted total knee prosthesis presents to the inpatient orthopedic service with escalating knee pain and evidence of prosthetic failure. Imaging and clinical exam suggest loosening and mechanical complication of the implant with associated pain. The patient is admitted to the hospital (POS 21) for operative management. The surgical plan includes removal of the existing total knee prosthesis, including removal of methylmethacrylate cement, with or without placement of an antibiotic spacer depending on intraoperative findings and infection risk. The workflow includes preoperative evaluation by an orthopaedic or adult reconstructive orthopaedic surgeon, perioperative anesthesia, intraoperative prosthesis and cement removal, possible spacer insertion, postoperative inpatient monitoring, and coordination with infectious disease if infection is suspected.
Coding Specifications
-
Common Modifiers
-
51- Multiple Procedures: Use when multiple distinct surgical procedures are performed at the same operative session by the same provider; appended per payer rules where applicable. -
59- Distinct Procedural Service: Use when a procedure is distinct or independent from other services performed on the same day; applies when documentation supports a separate procedural service. -
Provider Taxonomies
| Taxonomy Code | Specialty |
|---|---|
207X00000X | Orthopaedic Surgery Physician |
207XS0114X | Adult Reconstructive Orthopaedic Surgery Physician |
-
Notes
-
Use of modifiers is subject to specific payer policies; ensure documentation supports modifier usage.
-
Typical site of service is inpatient hospital (POS 21).
Related Diagnoses
-
T84.84XA- Pain due to internal orthopedic prosthetic devices, implants and grafts, initial encounterClinical relevance: Indicates pain attributable to the implanted knee prosthesis, supporting the need for prosthesis removal when pain is due to device failure or complications.
-
T84.83XA- Mechanical complication of internal joint prosthesis, initial encounterClinical relevance: Documents mechanical failure (loosening, instability, malalignment) of the knee prosthesis, a common indication for removal and revision.
-
M25.561- Pain in right kneeClinical relevance: Localizes symptomatology to the right knee; supports clinical presentation prompting prosthesis evaluation and possible removal when correlated with prosthetic complications.
-
M25.562- Pain in left kneeClinical relevance: Localizes symptomatology to the left knee; supports clinical presentation prompting prosthesis evaluation and possible removal when correlated with prosthetic complications.
-
Z96.651- Presence of right artificial knee jointClinical relevance: Documents prior presence of a right knee prosthesis, relevant for surgical history and justification for removal of the existing implant.
-
Z96.652- Presence of left artificial knee jointClinical relevance: Documents prior presence of a left knee prosthesis, relevant for surgical history and justification for removal of the existing implant.
Related CPT Codes
| CPT Code | Description | Relationship to 27488 |
|---|---|---|
27447 | Total knee arthroplasty | Alternative primary procedure for primary knee replacement; not performed concurrently with removal of existing prosthesis except in staged care where a replacement is implanted instead of or after removal. |
27486 | Revision of total knee arthroplasty, with or without allograft; one component | Alternative or subsequent procedure when component-level revision is performed instead of complete prosthesis removal; may be used when only one component requires revision. |
27487 | Revision of total knee arthroplasty, with or without allograft; femoral and entire tibial component | Alternative or subsequent procedure for more extensive revision involving femoral and tibial components; may follow or replace 27488 depending on intraoperative findings. |
20680 | Removal of implant; deep (e.g., buried wire, pin, screw, metal band, nail, rod or plate) | Related implant removal code for deep hardware not specific to knee prostheses; may be billed when separate deep implant removal unrelated to the knee prosthesis occurs during the same encounter. |
-
Usage
-
27488is specific to removal of total knee prosthesis with cement and possible spacer placement; the other codes represent revision or alternative implant removal strategies and are used based on the extent of revision performed or separate hardware removed.
National Reimbursement Benchmarks
Medicare mean allowed rates for 27488 sit between the commercial averages represented by BUCA and several large national insurers. BUCA (the blended commercial benchmark) has a higher mean rate ($1,556.92) than Medicare ($1,117.43), indicating commercial payments generally exceed Medicare for this code; several large commercial payers (Cigna and UnitedHealth Group) report mean rates notably above BUCA.
Rate dispersion, measured as the difference between the 75th and 25th percentiles, varies across payers. UnitedHealth Group and Cigna show the widest dispersion (UHC: $1,249.00; Cigna: $1,159.00), indicating broader variability in allowed rates, while Medicare is the tightest (range $84.00), followed by Aetna (range $548.00), reflecting more concentrated payment levels. The table and chart below present the full numeric breakdown of mean rates and percentiles.
Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.